Problem with Geometry App calculation

04112014, 02:25 PM
Post: #1




Problem with Geometry App calculation
Dear All,
to get a feeling of how the Geometry App works, I tried to solve a simple problem, which is to calculate the heights of a tower by measuring the angle from a known distance. I know that distance*tan(angle) is the sought after value. But it would be more fun to do it with the Geometry App. Angle measure is DEG. Let distance = 50m and angle = 68°. For easier handling divide distance by 10. So in SYMB mode I entered: GA:=DrawSlp(0,0,2.47509) Rem: 2.47509 = tan(68) to convert the measured angle to slope GB:=line(point(5,0),Point(5,10)) GC:=inter(GA,GB) GD:=triangle(point(0,0),point(5,0),GC) GE:=angleat(GA,GB,GC,point(3,6)) The result is "aA=0.384" but I would expect "aA=68". What am I doing wrong? I used the Prime Emulator software for this with version 2013 11 25 (5447). Thank you very much in advance. Best regards Karl 

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